In a kind, courteous, and elegant manner, showing good manners and generous behavior.
From 'gracious' (from Latin 'gratiosus' meaning pleasing, from 'gratia' meaning grace/favor) plus the adverb-forming suffix '-ly.' Ultimately from the concept of divine grace.
The root 'gratia' (grace/favor) connects to 'grateful,' 'gratitude,' and 'grant'—the whole family of words shares the idea of receiving something good, whether it's favor, thanks, or a gift.
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